Essential light chain S195 phosphorylation is required for cardiac adaptation under physical stress.
Essential light chain S195 phosphorylation is required for cardiac adaptation under physical stress.
复制标题
心脏在身体压力下的适应需要必需的轻链 S195 磷酸化
DOI:
10.1093/cvr/cvw066
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发表时间:
2016
影响因子:
10.8
通讯作者:
Hassel D
中科院分区:
文献类型:
--
作者:
Scheid LM;Mosqueira M;Hein S;Kossack M;Juergensen L;Mueller M;Meder B;Fink RHA;Katus HA;Hassel D
AimsRegulatory proteins of the sarcomere are pivotal for normal heart function and when affected by mutations are frequently causing cardiomyopathy. The exact function of these regulatory proteins and how mutations in these translate into distinct cardiomyopathy phenotypes remains poorly understood. Mutations in the essential myosin light chain (ELC) are linked to human cardiomyopathy characterized by a marked variability in disease phenotypes and high incidences of sudden death. Here we studied the role of the highly conserved S195 phosphorylation site of ELC using heterozygous adult zebrafishlazy susan(lazm647) in regulating contractile function in normal physiology and disease.Methods and resultsEchocardiography revealed signs of systolic dysfunction in otherwise phenotypically unremarkable heterozygote mutants. However, after physical stress, heart function oflazheterozygous zebrafish severely deteriorated causing heart failure and sudden death. Mechanistically, we show that upon physical stress, ELCs become phosphorylated and lack of S195 dominant-negatively impairs ELC phosphorylation.In vitromotility analysis with native myosin from adult heterozygous hearts demonstrates that S195 loss, specifically following physical stress, results in altered acto-myosin sliding velocities and myosin binding cooperativity, causing reduced force generation and organ dysfunction.ConclusionUsing adult heterozygous zebrafish, we show that ELC S195 phosphorylation is pivotal for adaptation of cardiac function to augmented physical stress and we provide novel mechanistic insights into the pathogenesis of ELC-linked cardiomyopathy.
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影响因子:
20.1
作者:
Meder, Benjamin;Laufer, Christina;Rottbauer, Wolfgang
通讯作者:
Rottbauer, Wolfgang
DOI:
10.1134/s0006297908020090
发表时间:
2008
期刊:
Biochemistry (Moscow)
影响因子:
--
作者:
L. Nikitina;G. Kopylova;D. Shchepkin;L. Katsnelson
通讯作者:
L. Katsnelson
影响因子:
10.8
作者:
Chen, Zhenyue;Huang, Wei;Xu, Xiaolei
通讯作者:
Xu, Xiaolei
影响因子:
5.5
作者:
Elangovan, R.;Capitanio, M.;Piazzesi, G.
通讯作者:
Piazzesi, G.
DOI:
--
发表时间:
2012
期刊:
--
影响因子:
--
作者:
S. Walcott;D. Warshaw;E. Debold
通讯作者:
S. Walcott;D. Warshaw;E. Debold